How to improve the chemical bond strength in extruded composite films?

The chemical bonding strength is determined by the degree of polarization of the film surface and the degree of oxidation of the molten resin. The degree of polarization of the film surface and the degree of oxidation of the molten resin are high. Then, there are many polar groups on the surface of the two materials, which increases the point of chemical reaction between the two materials, and improves the chemical bonding strength of the composite film. The main factors that affect the degree of oxidation of the molten resin are as follows: 1. The influence of the processing temperature of the molten resin, the higher the temperature, the higher the degree of oxidation of the molten resin; 2. The influence of the air gap, the larger the air gap, the higher the degree of oxidation of the molten resin. The longer the residence time in the air, the longer the reaction time with oxygen, resulting in an increase in the degree of oxidation of the molten resin. 3. The influence of compounding speed, the slower the compounding speed, the longer the molten resin stays in the air, and the longer the reaction time with oxygen, resulting in an increase in the degree of oxidation of the molten resin. Therefore, in order to improve the extrusion composite film To improve the chemical bonding strength, the following methods can be taken: 1. Increase the resin processing temperature; 2. Increase the air gap; 3. Reduce the compounding speed. More compound knowledge, more food packaging bags, all in YLTpacking: http://www.yltpacking.com